luojifenxiyi
所属分类：单片机开发
开发工具：C/C++
文件大小：122KB
下载次数：13
上传日期：2009-10-22 11:27:06
上 传 者：
zhaolipo
说明： 逻辑分析仪是利用时钟从测试设备上采集和显示数字信号的仪器，最主要作用在于时序判定。由于逻辑分析仪不像示波器那样有许多电压等级，通常只显示两个电压（逻辑1和0），因此设定了参考电压后，逻辑分析仪将被测信号通过比较器进行判定，高于参考电压者为High,低于参考电压者为Low，在High与 Low之间形成数字波形。例如：一个待测信号使用200MHz采样率的逻辑分析仪，当参考电压设定为1.5V时，在测量时逻辑分析仪就会平均每5ns采取一个点，超过1.5V者为High(逻辑1)，低于1.5V者为Low（逻辑0），而后的逻辑1和0可连接成一个简单波形，工程师便可在此连续波形中找出异常错误（bug）之处。整体而言，逻辑分析仪测量被测信号时，并不会显示出电压值，只是High跟Low的差别；如果要测量电压就一定需要使用示波器。除了电压值的显示不同外，逻辑分析仪与示波器的另一个差别在于通道数量。一般的示波器只有2个通道或4个通道，而逻辑分析仪可以拥有从16个通道、32个通道、64个通道和上百个通道数不等，因此逻辑分析仪具备同时进行多通道测试的优势。
(Logic Analyzers)
文件列表:
逻辑分析仪\logic.h (1251, 2006-12-25)
逻辑分析仪\logic.c (11293, 2006-12-25)
逻辑分析仪\logic.hex (7905, 2006-12-22)
逻辑分析仪\Logic.SCH (32149, 2006-12-22)
逻辑分析仪\新建 文本文档.txt (683, 2006-12-26)
逻辑分析仪\LoLA\LCD.DAT (2329, 2002-01-12)
逻辑分析仪\LoLA\WZERO.DAT (2329, 2002-01-05)
逻辑分析仪\LoLA\I2Ctest.dat (2330, 2003-07-06)
逻辑分析仪\LoLA\SAA1064d.dat (2329, 2002-01-06)
逻辑分析仪\LoLA\LOLA.CFG (1, 2006-12-22)
逻辑分析仪\LoLA\LoLA.txt (3400, 2004-12-08)
逻辑分析仪\LoLA\LoLA32_CH.exe (269824, 2004-06-07)
逻辑分析仪\LoLA (0, 2006-12-27)
逻辑分析仪 (0, 2006-12-27)
LoLA is a very low-cost 8-bit logic-analyzer
based on the Atmel AT90S1200 microcontroller.
Update v0.23:
BUG fixed: Timing parameters were saved in DAT-Files
but not updated when file was reloaded. Sorry!
In timing-mode data is recorded by internal clockrates
from 2us to 16ms per sample or by an external clock on
rising or falling edge.
The triggercondition can be specified by an internal
triggerword (bits set to high, low or don't care) or by
an external trigger on rising or falling edge.
In state-mode every change on the input-channels is
stored in memory. Data can be captured nearly every 1,2us.
This means, a signal about 400kHz (with 50% duty-cycle)
is recorded without problems.
The LoLA.EXE program commands the controller and shows
the recorded data in a timing-diagram.
The analyzer can handle the recorded data from an I2C-
Bus communication or a LC-Display in 4-bit-mode.
Sample-Datafiles:
I2CTEST.DAT is an I2C-communication recorded in timing-
mode.
SAA10***D.DAT is an I2C-communication recorded in state-
mode.
Both can be handled by the I2C-Analyzer.
LCD.DAT is the captured data (state-mode) from a
LC-Display, it can also be analyzed.
WZERO.DAT is a testpattern, generated by the 90S1200-
controller.
The Picture-Files:
These files show screenshots from LoLA.EXE.
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